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BaLLatris [955]
3 years ago
13

7.

Physics
1 answer:
laiz [17]3 years ago
6 0

7. Matthias Schleiden

8. An Element

9. Compound Microscope

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Two planets X and Y travel counterclockwise in circular orbits about a star, as seen in the figure.
sergeinik [125]

Planet Y has rotated by 135.5° through during this time.

To find the answer, we need to know about the relation between angle and radius of orbit.

<h3>What's the expression of angle in terms of radius?</h3>
  • Angle= arc/radius
  • As arc = orbital velocity × time,

            angle= (orbital velocity × time)/radius

  • Orbital velocity= √(GM/radius), G= gravitational constant and M = mass of sun
  • So, angle = (√(GM)× time)/radius^3/2
<h3>What's is the angle rotated by planet Y after 5 years, if ratio of the radius of orbit of planet X and Y is 4:3 and planet X is rotated by 88°?</h3>
  • Let Ф₁= angle rotated by planet Y, Ф₂= angle rotated by planet X
  • As time = 5 years ( a constant)
  • Ф₁/Ф₂= (radius of planet X / radius of planet Y)^(3/2)
  • Ф₁= (radius of planet X / radius of planet Y)^(3/2) × Ф₂

   = (4/3)^(3/2) × 88°

   = 135.5°

Thus, we can conclude that Planet Y has rotated by 135.5° through during this time.

Learn more about the orbital velocity here:

brainly.com/question/22247460

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8 0
2 years ago
The speedometer in a car does not measure the car’s velocity because the velocity is a
Marat540 [252]

Answer:

It does not indicate the car's direction. Since velocity is both magnitude and direction, the speedometer measures speed but does NOT measure velocity

3 0
3 years ago
A runner starts at point A runs around a 1 mile track and finishes the run back at point A. Which of the following statement is
Zanzabum
The runner's displacement and average velocity are both zero. (I hope this answer is on the list of choices that you neglected to share.)
4 0
3 years ago
1) An object is hung using a metal spring. If now a current is passed through the spring, what will happen to this system?
son4ous [18]

Answer:

D) The spring will contract, raising the weight.

Explanation:

According to the statement there is current that will enter the current through the metal ions that it has in its stratum. The passage of the current will generate within the spring a magnetic field that travels in a loop. That is, while the upper part of the spring which is also that of the spring acts as a north pole, the lower part of the spring and the magnetic field will act as the south pole. The position of the poles will generate an opposition effect that will generate an attraction to each other which will generate a contraction in the spring and an increase in weight on it.

6 0
4 years ago
216 joules of energy is required to raise the temperature of aluminium from 15 degrees Celsius to 35 degrees Celsius. Calculate
nasty-shy [4]
0.0017 is the mass of aluminum .
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4 years ago
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